Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Aisin Corporation

Fumiaki Aikawa

Kenichi Tsuchida

Yoshinobu Soga

Yoshimitsu Hyodo

Mitsuhiro Fukao

Hiromitsu Nitani

Koji Makino

Makoto Sawada

Kyohei Suzumura

Yuta Seriguchi

Syuji Moriyama

Kazuharu Asai

Harunobu Umemura

A hydraulic control device that includes a primary pressure control valve that has a first valve element and that regulates the primary pressure by varying a position of the first valve element in accordance with operation of a first electromagnetic actuator; a secondary pressure control valve that has a second valve element and that regulates the secondary pressure by varying a position of the second valve element in accordance with operation of a second electromagnetic actuator; and a fail-safe valve that varies the position of the first valve element such that the primary pressure is reduced when the first electromagnetic actuator and the second electromagnetic actuator become inoperable.

Hydraulic control device for automatic transmission

A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.

Growing community of inventors

Anjo, Japan

Fumiaki Aikawa